I'm glad we at least agree that Mutant Mudds is a fantastic title.
I plan on going back to NSMB in the future, but from what I recall it and NSMBWii are the better titles than 2 and U. 2 is the most uninspired and U only benefits from the world map. Also, DS had SM64 which is better than 3D Land and NSMB2 combined.
But I do feel the discussion has veered in the wrong direction- where are the third party experiments? Where are the RPGs? Where is the volume of the 3DS library? Too often I see the same games being thrown around, which makes sense because some of them are good, but I am surprised by the lack of independent recommendations, and disappointed when I see the glaring flaws of titles like Mirror of Fate, or anything remotely related to Sonic. Even games like Henry Hatsworth and Contact are absent, or come in the form of eShop games, which there's a lot of but only a select few are stellar.
I already see the 3DS losing steam- they're throwing a free to play Pokemon Shuffle up, a new IP, a remake (it's quality nonwithstanding) and a new Fire Emblem out this year. I only want one of those things. Coupled with last year's poor showing I feel that 2013 was the best year the 3DS will ever have, and had the best title the 3DS will ever have as well.